public void CheckStringForDigitsTest_StringWithoutDigit_ReturnFalse()
        {
            DataValidation dataValidation = new DataValidation();
            bool           factResult;
            string         str = "ffffffsdjkuyyeklaa";

            factResult = dataValidation.CheckStringForDigits(str);
            Assert.IsFalse(factResult);
        }
        public void CheckStringForDigitsTest_StringWithDigit_ReturnTrue()
        {
            DataValidation dataValidation = new DataValidation();
            bool           factResult;
            string         str = "a12ssdfsdf7sdf";

            factResult = dataValidation.CheckStringForDigits(str);
            Assert.IsTrue(factResult);
        }